The Ruhstrat GmbH is a modern
company with a great tradition.
Ruhstrat is a technology provider covering the segments of Electrical
Engineering and special machines. Ruhstrat manufactures non-standard
products, but individually tailored to the needs of the customer leading
edge technology.

Product Portfolio

Industrial furnaces

Convincing down
to the smallest detail
CUSTOMIZED HEAT TREATMENT PLANTS AND INDUSTRIAL FURNACESDo you treat organic substances, metals or carbon fibre? Would you like
to harden or temper, sinter or anneal, oxidize or graphitize your work
parts?
In each single case – and many more – we are the right person to contact for
you. Since we are specialized in the development, construction,
commissioning and maintenance of specific heat treatment plants and
industrial furnaces – for more than 120 years. Therefore you can rely on the
continuity and the practical experiences of our company.
Furthermore we stand out on the market due to our efficient and high
quality, individually produced heat treatment plants. And also our
comprehensive range of service offers and our after sales service are a real
additional value for our customers.

Chemical industry

Forward looking technology
THE CONSTRUCTION OF INDUSTRIAL FURNACES FOR THE CHEMICAL INDUSTRYFor companies of the chemical industry energy efficiency and
sustainability are of great importance regarding heat treatment. Due to the
outstanding training of our engineers and the close connection of our
company to research departments we develop solutions for you that meet the
demands in an optimal way and are tailored according to your job definition.
Thereby we offer a comprehensive spectrum of customized solutions, which
enable you in different ways to treat different material. Of course we also
undertake the development and adjustment of the corresponding periphery.

Carbon fiber and graphite industry

High Flexibility through specific plants
THE INDUSTRIAL FURNACE CONSTRUCTION FOR THE CARBON AND GRAPHITE INDUSTRY
Whether in the automobile industry or somewhere else – due to their variety
and specific advantages carbon fiber and graphite are still on the rise and
are increasingly used in the production. With our customized solutions we
are able to meet this vast spectrum.
Our industrial furnaces are used for the processing of different materials
and enable you to work with different heat treatment methods. The
development and installation of the corresponding periphery belongs also to
our core competencies.

Metal-processing industry

Energy efficient and process optimized
INDUSTRIAL FURNACE CONSTRUCTION FOR THE METAL-PROCEEDING INDUSTRYIn the metal-processing industry heat treatment plants need to be
integrated ideally in the production process. Thereby companies can
strengthen and enlarge their position on the competitive marked. Due to our
special know-how and our long lasting experience in this sector we are an
excellent partner for you.
The range of our customized solutions include industrial furnaces for
different heat treatment plants and a number of materials. Of course our
range of services also include the development and construction of the
corresponding periphery.

Iron ore or coke testing

For precise resultsLAB FURNACES ACCORDING TO ISO STANDARDS FOR IRON ORE OR COKE TESTS
When it comes to precise data, a fully developed technology is the best
guarantor for liability. Even though our lab furnaces are very different in
use and application they have one characteristic in common: With our
furnaces you are able to determine assured and comparable data –
irrespective of the fact if you would like to use our furnaces for testing
iron ore or coke.

Process control

Perfection up to the periphery
SYSTEM SOLUTIONS WITH APPROPRIATE PROCESS CONTROL

Our industrial furnaces are individual plants for which we also design,
develop, build and maintain the corresponding peripheral devices.
Because only with exact control, optimal regulation and complete supervision
of processes you obtain reliably the results that you can expect from a
Ruhstrat plant.
Therefore our range of system solutions is ample

Advice / Competences

From the very first beginning on your side
INDUSTRIAL FURNACES FROM THE DESIGN TO THE MAINTENANCE

At Ruhstrat you as the customer are always centre stage. Because we
develop in a closely design matching process with you in a high quality,
forward-looking and economical working technologies which exactly meets your
individual requirements.
Rely simply on our over more than 120 years old practical experience in the
industrial furnace construction, the flexibility and the active follow of
our highly qualified employees.

Service

Safety by service
CUSTOMER SERVICE FROM OUR EXPERTSWith our comprehensive care you are best served. Because we are at your
disposal also after the delivery of an industrial furnace with words and
deeds.
Since our single-part productions are specific harmonised to the special
features of the use at you, our technicians and engineers install by request
the equipment on-site and perform the commissioning. Also we take over the
observation at the start-up of the equipment and we instruct your operating
staff, to ensure a smoothly workflow for the following production process.
The long life time cycle of our equipments assures next to the service also
the quick supply with the fitting original parts.

Transformers / Power Resistors

OPTIMUM VOLTAGE
Ruhstrat has decades of experience in developing and manufacturing
electrical winding products. We offer more than innovative technology. Being
a reliable partner we assist our customers by developing optimal solutions
customized to their needs.
While carrying out the development, the design, the delivery and the
creation of solutions is an important part of our business, another
important part is the performance of a service comprising all expected
tasks, from the maintenance to the support.
Ruhstrat has been specialized in developing and designing transformers,
reactors, power supplies and power resistors. Besides the complete standard
programme of these business fields Ruhstrat emphasizes the design and
manufacturing of plants and systems individually tailored to the
requirements of our customers. We manufacture custom-made transformers,
reactors, power supplies and power resistors. Ruhstrat components are used
wherever products made to specification and small and minimum batch sizes
are needed, so for uses which cannot be provided with bulk goods.

High-Current Transformer

Power Resistors

For more than 100 years Ruhstrat power resistors have
been used all around the world in many electrotechnical fields. Our concept
is to offer complete solutions and to be a reliable partner for our
customers. We develop and manufacture power resistors for a large variety of
different technical applications, in a power range from 10W up to several
5.000 kW.
Ruhstrat is not only characterized by a broad application programme but most
notably by the know-how concerning project planning of various resistor
plants. According to the requirements and specifications of the respective
project we dimension and manufacture the desired resistor plant.

rated power 50 W up to 5.000 kW

Load Resistors

Whether they are needed for test purposes and for proving
batteries, transformers, generators, power generation aggregates and power
supply units or as load bank for your test field – Ruhstrat offers you an
economic solution for each kind of application. Power values of several MW
under permanent operation as well as special constructions can be
implemented. The devices which are in most of the cases customized products
can be equipped with any kind of step control, regulation, measurement and
control unit.

Test Resistors

Whether you need a proof of functioning for generators or
a load bank for your test field, we offer you an economic solution for each
kind of application. Power values of several MW under permanent operation as
well as special constructions can be implemented. In case of test field
application the operation surface of the resistor enclosure is made with
screenprint, if desired, for easier and clearer usability.

Laboratory Resistors

Ruhstrat laboratory resistors have been developed
specially for schools, colleges, institutes and universities. Whether they
are needed as fixed resistors, slide resistors or variable resistors - all
laboratory resistors are completely equipped with bottom plate and rubber
feet, shock-proof Ruhstrat binding posts and earthing terminal as well as
with a protective cover.

Steel Grid Resistors

Ruhstrat resistor elements are available with resistances
ranging from 8.8 mOhm to 6.2 Ohm.

The continuous output of these grids is approximately 500
W.

The plates may be switched in series and parallel. As a result, every
conceivable resistance value can be realised quickly and easily. You may
choose between standard stainless steel resistor elements or our special
alloyed version.

Tube Resistors

High-quality ceramic tubes, perfect windings are the
basis of the high quality of our tube resistance and allow for long life and
high reliability. By a layer of a special cementing the windings are
mechanically fixed and protected against external influences, which removes
the heat dissipation is improved.

Wirewound Resistors

For the winding of the resistors round resistor wire or
band made of Isotan CuNi44 is used, with a very small thermal coefficient of
resistance. Our resistor elements are outstandingly suitable, specially for
applications which demand a high resistance accuracy over a broad
temperature range. Thanks to the high resistance accuracy there are no
tolerances with the resistance values. The resistor elements serve for the
assembly of big load resistors. Thanks to their space-saving construction,
their flat design and their modular system they are all-purpose resistor
elements.

Variable Toroidal Resistor (Potentiometer)

Stepless adjustable, these rheostats offer flexibility in
the smallest place. Operation can manual or motor driven, but in either case
Ruhstrat can supply modules to meet your individual requirements with drives
and limit switches. All rheostats are fitted with 3 terminals and insulated
axis. Therefore, they can be used as voltage divider and also as
compensating resistance. Silver contacts are used for making contact. He
windings are mechanically fixed and protected against influence from outside
by a layer made of special cementation so that the dissipation of heat is
improved.

Braking Resistors

Ruhstrat braking resistors can take short-time loads as
well as the desired permanent power (e. g. braking resistors for frequency
converter drives). For smaller drives resistor elements are very frequently
used and for bigger drives steel grid resistors are used.

Damping Resistors

Ruhstrat damping resistors are integral parts of inrush
current damping units. Especially with the manufacture of transformers
damping resistors are used for limiting the inrush current. With Ruhstrat
inrush current damping units inrush currents are limited to the 3.5-fold
rated current.

Starting Resistors

Whether you need a proof of functioning for generators or
a load bank for your test field, we offer you an economic solution for each
kind of application. Power values of several MW under permanent operation as
well as special constructions can be implemented. In case of test field
application the operation surface of the resistor enclosure is made with
screenprint, if desired, for easier and clearer usability.

Discharge Resistors

By means of Ruhstrat discharge resistors inductive and
capacitive components resp. batteries are discharged. With batteries they
are used to ascertain which is the remaining capacity of an accumulator
battery which had been fully charged before. Whether you need the discharge
resistor for insertion into substations or as mobile device, with natural
air cooling or with forced air ventilation, Ruhstrat has the ideal solution
for each kind of application.

Grounding Resistors

In medium-voltage mains with neutral earthing with low
resistance our grounding resistors limit a coming up earth fault current to
an admissible maximum value until the respective protective relays have
switched off the faulty circuit. Ruhstrat grounding resistors are completely
delivered according to the customer´s requirements, with a current
transformer, no-load switch or load switch etc.